Action in the North Atlantic

A first-time captain leads a convoy of allied ships carrying thousands of soldiers across the treacherous waters of the "Black Pit" to the front lines of WWII. With no air cover protection for 5 days, the captain and his convoy must battle the surrounding enemy Nazi U-boats in order to give the allies a chance to win the war.

When Russia's first nuclear submarine malfunctions on its maiden voyage, the crew must race to save the ship and prevent a nuclear disaster.

After the Cold War, a breakaway Russian republic with nuclear warheads becomes a possible worldwide threat. U.S. submarine Capt. Frank Ramsey signs on a relatively green but highly recommended Lt. Cmdr. Ron Hunter to the USS Alabama, which may be the only ship able to stop a possible Armageddon. When Ramsey insists that the Alabama must act aggressively, Hunter, fearing they will start rather than stop a disaster, leads a potential mutiny to stop him.

In the midst of World War II, the battle under the sea rages and the Nazis have the upper hand as the Allies are unable to crack their war codes. However, after a wrecked U-boat sends out an SOS signal, the Allies realise this is their chance to seize the 'enigma coding machine'.

Mr. Roberts is a Navy officer who's yearning for battle but is stuck in the backwaters of World War II on a non-commissioned ship run by the bullying Captain Morton.

During WWII, Duke E. Gifford is second in command of the USS Thunderfish, a submarine which is firing off torpedoes that either explode too early or never explode at all. It's a dilemma that he'll eventually take up personally. Even more personal is his quest to win back his ex-wife, a nurse; but he'll have to win her back from a navy flier who also happens to be his commander's little brother.

A German living in India during World War II is blackmailed by the English to impersonate an SS officer on board a cargo ship leaving Japan for Germany carrying a large supply of rubber for tyres. His mission is to disable the scuttling charges so the captain cannot sink the ship if they are stopped by English warships.

During World War II, a small group of survivors is stranded in a lifeboat together after the ship they were traveling on is destroyed by a German U-boat.

After a demonstration of new PT boats, Navy brass are still unconvinced of their viability in combat, leaving Lt. "Rusty" Ryan frustrated. After the attack on Pearl Harbor, however, Ryan and his buddy Lt. Brickley are told they can finally take their squadron into battle. The PT boats quickly prove their worth, successfully shooting down Japanese planes, relaying messages between islands, and picking off a multitude of enemy ships.

Captain Horatio Hornblower leads his ship HMS Lydia on a perilous transatlantic voyage, during which his faithful crew battle both a Spanish warship and a ragged band of Central American rebels.

As the Second World War breaks out, German freighter captain Karl Ehrlich is about to leave Sydney, Australia with his vessel, the Ergenstrasse. Ehrlich, an anti-Nazi but proud German, hopes to outrun or out-maneuver the British warship pursuing him. Aboard his vessel is Elsa Keller, a woman Ehrlich has been ordered to return to Germany safely along with whatever secrets she carries. When Ehrlich's fiercely Nazi chief officer Kirchner commits an atrocity, the British pursuit becomes deadly.

Fr. Hugh O'Flaherty is a Vatican official in 1943-45 who has been hiding downed pilots, escaped prisoners of war, and Italian resistance families. His activities become so large that the Nazis decide to assassinate him the next time he leaves the Vatican.